Hypodermic syringe construction



May-19, 1942. A. E. sMn-H HYPODERMIC SYRINGE CONSTRUCTION Filed May 5, 1959 5 xm.. \M

INVENTOR. Arhur E. Smirln ATTORNEY.

H 4 4 4 M. EWWW wv m Patented May 19, 1942 UNITED STATES PATENT Q'FFICE 2,283,234 HYPODERMIC SYRINGE CONSTRUCTION l Arthur E. Smith, Los Angeles, Calif.

Application May 5, 1939,r Serial No. 271,888 A (Cl. 12S-218) 3 Claims.

This invention relates to syringes.

The general object of the invention is to provide a novel ampule syringe.

Another object of the invention is to provide a novel syringe barrel for supporting an ampule.

A further object of the invention is to provide a novel ampule cork.

Another object of the invention is to provide a novel ampule.

Other objects and the advantages of thisY invention will be apparent from the following description taken in connection with the accompanying drawing, wherein:

Fig. 1 is a central sectional View through a syringe embodying the features of my invention;

Fig. 2 is an enlarged sectioni taken on line 2 2, Fig. 1;

Fig. 3 is an enlarged fragmentary sectional view of the ampule;

Fig. 4 is a fragmentary sectional view showing the ampule and associatedparts;

Fig. 5 is a fragmentary sectional View showing a modied ampule cork; and

Fig. 6 is a central sectional view showing a further modified cork.

Referring to the drawing by reference characters I have indicated a syringe embodying the features of my invention generally at I0. As

shown the syringe includes a front member j having an aperture I2 through which a needle I3 extends. The front member I is also provided with a needle I4 which is disposed at one side of the axis of the barrel and which extends into the barrel farther than does the needle |3,

At the rear end the barrel is provided with a rear member I5 which includes a telescopic section I6 having a head |'I thereon which is normally urged against the upper end of an ampule I8 by a spring I9.

At its rear end the ampule includes a resilient piston closure cork 20 which is shown as engaged by a ilange 2| on a plunger 22 mounted on the rear end member.

The front of the ampule is provided with a rubber cork 23 which has a shoulder 24 thereon engaging the end of the ampule and has a cavity 25 thereon the outer end of which is closed by a diaphragm 25. A medicinal tablet 2l is disposed adjacent to the cork 23 and is hermetically sealed from the remainder of the ampule by a cork or disk 28 which is made of rubber or similar material. The cavity 25 enables the cork 23 to have suicient length so that it will not be displaced readily and also permits the diaphragm 26 to be thin so that it may be readily punctured.

In operation the ampule is placed in therbarrel and the needle |4 passing through the diaphragm 2B as shown in Fig. 4 dislodges the tablet 21 and the disk 28. The needle |4 being oirset with respect to the axis of the ampule assures that the disk 28 will be tilted and displaced. After the disk is unseated, thus allowing the tablet to mix with the vehicle in the ampule, the needle I2 may be inserted and secured in place with its end passing through the diaphragm 26. The pressure of the rear member urges the ampule forward so that a fluid tight seal is maintained atthe forward end thereof.

In Fig. 5 the ampule 30 is provided with an end cork 3| having an outer recess 32 and an inner diaphragm 33 with a medicinal preparation 34 adjacent to the end of the cork 3| and held in place by a resilient disk 35. The recess 32 enables the cork 3| to have suiicient length so that it will not be displaced readily and also permits the diaphragm 33 to be thin so that it may be readily punctured.

In operation the ampule 30 is inserted is a syringe similar to that previously described and the needle |4 passing through the diaphragm 33' tilts and displaces the disc 35 allowing the vehicle and drug 34 to mix after which the solution may be injected through the needle I3.

In Fig. 6 the ampule 40 includes an end cork 4| having an outer recess 42 and an inner recess 43 with a diaphragm 44 between the recesses. The recesses 42 and 43 enable the cork 4| to have suiicient length so that it will remain in place and also produce a thin diaphragm 44.

A tablet 45 is inserted in the recess 43 and is held in place by a tiltable disk 45 which is shown as directly engaging the end of the cork 4|. The use of the ampule shown in Fig. 6 will be obvious from the preceding description.

From the foregoing it will be apparent that I have invented a novel syringe, ampule and amy pule cork which are highly ecient for their intended purpose.

Having thus described my invention, I claim:

1. In a syringe, a cylindrical barrel having a front and rear member thereon, said rear member having means thereon to engage a cylindrical ampule, a plunger in the rear member, said front member having a hole therethrough, and an injecting needle passing through said hole and adapted to pass into the ampule, and`a piercing needle Xed on the one of the members and eXitending into the barrel beyond the injecting needle, said piercing needle being disposed at one side of the axis of the cylindrical barrel.

2. In a syringe, a cylindrical barrel having a plunger thereon, a cylindrical ampule in the barrel, said ampule having a cork therein at the front end, said cork having a recess therein, a medicinal tablet adjacent said cork, a second cork adjacent the first cork and sealingly engaging the inner Wall of the ampule to form an hermetic seal therewith, a front member on the syringe having a hole therethrough, an injecting needle passing through said hole and into the ampule, and a piercing needle on the front member.

and extending into the barrel, said piercing needle being disposed at one side; of the axis of the cylindrical barrel and being/of 'a lengthto engage the second cork.

3. In a syringe, a cylindrical barrel having a.

front and a rear member thereon, a cylindricalj ampule in said barrel, said rear member having means thereon to engage the ampule, a plunger in the rear member, a piston cork in the ampule and engaged by said plunger, said ampule having a cork therein at the front end engaging the syringe front member in fluid tight relation, said front cork having a recess therein, a medicinal tablet adjacent said front cork, a second cork adjacent the front cork and sealingly engaging the inner wall of the ampule to form an hermetic seal therewith, said front member having a hole therethrough, an injecting needle passing through said hole and into the ampule, and a piercing needle on the front member and extending into the barrel, said piercing needle being disposed at one side of the axis of the cylindrical barrel and being of a length to engage the second cork.

- ARTHUR E, SMITH. 

